Chemical Equations Practice

The products of a reaction have the same ________as the reactants.

• molecule

• atoms

• subscripts

• coefficients

When balancing this equation, Fe + Cl₂ → FeCl₃, the correct coefficient for Cl₂?

• 1

• 2

• 3

• 4

Balance this equation, CaCO₃(s) → CaO(s) + CO₂(g)?

• 3,1,2

• 1,1,1

• 1,3,1

• 2,6,3

Balance this equation, AlCl₃ + NaOH → Al(OH)₃ + NaCl

• 3,1,3,1

• 1,3,3,1

• 1,1,1,3

• 1,3,1,3

Balance the following equation: Cr(s) + Fe(NO₃)₂ (ag) → Fe(s) + Cr(NO₃)₃ (ag)

• 2,3,3,2

• 2,3,2,3

• 4,6,6,2

• 1,3,3,1

In the chemical equation H₂O₂(ag) → H₂O(l) + O₂(g), the O₂ is a

• reactants

• yield

• products

• solid

Fill in the blanks with coefficient:
PCl₅+_ H₂O→_ HCl+H₃PO₄

• 4, 5
• 1, 6
• 3, 8
• 2,2

What is a coefficient?

• The small number on the right of the chemical symbol.
• The large number to the left of a formula.

Balance this equation
_Zn+_HCl-->_ZnCl₂ +_H₂

• 1,1,2,1
• 1,1,1,2
• 1,2,1,1
• 2,1,1,1

How many atoms of aluminum are on each side of the following equation: 4Al + 3O₂ --> 2Al₂ O₃

• 2
• 6
• 1
• 4